This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A 100-W light bulb is left on for 20.0 hours. Over this period of time, how much energy did the bulb ... (Read 102 times)

natalie2426

  • Hero Member
  • *****
  • Posts: 524
on: Jul 28, 2018
A 100-W light bulb is left on for 20.0 hours. Over this period of time, how much energy did the bulb use?
 a. 1000 J
  c. 3,600,000 J
  b. 7.2 MJ
  d. 1.34 hp

Question 2

In a thundercloud there may be an electric charge of +40 C near the top of the cloud and -40 C near the bottom of the cloud. These charges are separated by about 2.0 km. What is the electric force between these two sets of charges? (ke = 8.99  109 Nm2/C2)
 a. 3.6  106 N
  c. 3.6  107 N
  b. 3.6  104 N
  d. 3.6  105 N


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

A


natalie2426

  • Member
  • Posts: 524
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

tandmlomax84

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

The moray eel meets its energy and nutrient needs by being an effective predator. The moray eel meets its energy and nutrient needs by being an effective predator.
Energy budget for a temperate deciduous forest (data from Gosz et al. 1978). Energy budget for a temperate deciduous forest (data from Gosz et al. 1978).
Time dependence of the rates of a chemical reaction Time dependence of the rates of a chemical reaction
Slap the foot bottom with the back of the hand. Rapid, light slaps create a stimulating sensation. Slap the foot bottom with the back of the hand. Rapid, light slaps create a stimulating sensation.
Generating Energy from Glucose When your body needs to break down glucose Generating Energy from Glucose When your body needs to break down glucose
A monochromatic beam of light of wavelength 600 nm is incident normally on a diffraction ... A monochromatic beam of light of wavelength 600 nm is incident normally on a diffraction ...
Video: ribosome

For a complete list of videos, visit our video library